US6848334B2 - Safety steering column - Google Patents

Safety steering column Download PDF

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Publication number
US6848334B2
US6848334B2 US10/078,155 US7815502A US6848334B2 US 6848334 B2 US6848334 B2 US 6848334B2 US 7815502 A US7815502 A US 7815502A US 6848334 B2 US6848334 B2 US 6848334B2
Authority
US
United States
Prior art keywords
casing
tube parts
connecting element
steering column
casing tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US10/078,155
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English (en)
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US20020124676A1 (en
Inventor
Hans Kluemper
Hanno Lox
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler AG
Original Assignee
DaimlerChrysler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DaimlerChrysler AG filed Critical DaimlerChrysler AG
Assigned to DAIMLERCHRYSLER AG reassignment DAIMLERCHRYSLER AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KLUEMPER, HANS, LOX, HANNO
Publication of US20020124676A1 publication Critical patent/US20020124676A1/en
Application granted granted Critical
Publication of US6848334B2 publication Critical patent/US6848334B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/16—Steering columns
    • B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
    • B62D1/19—Steering columns yieldable or adjustable, e.g. tiltable incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible
    • B62D1/192—Yieldable or collapsible columns

Definitions

  • the invention relates to a safety steering column for a motor vehicle, with a casing tube which is arranged concentrically to a steering shaft and is fastened to the vehicle body and which, in the event of an axial impact action, can be shortened, while at the same time absorbing energy, the casing tube consisting of two casing-tube parts which have different diameters and lie partially one in the other.
  • Axial sliding systems for steering columns are known in a wide variety of variants. They serve for giving way in the event of an accident and an impact of the vehicle occupant against the steering wheel caused thereby and, at the same time, for absorbing impact energy. Their operating principle is based on a securing member designed for a predetermined axial load on the steering column being released when the predetermined load is exceeded, so that the components connected to one another via the securing member can be pushed one into the other, with energy being absorbed at the same time.
  • German Patent Document DE-A-1 755 874 (Corresponding GB 1206388) discloses a safety steering column for a motor vehicle, which has a casing tube with two casing tubes lying partially one in the other. The parts of the casing tube which lie one in the other are designed conically in specific regions. A number of elastic deformation rings are arranged in the interspace of equal width which is formed by these regions and which are in the form of a cone envelope. As a result of a specific initial displacement of the two casing tubes in the direction of a shortening of the safety steering column, the elastic deformation rings are prestressed radially and the two casing tubes are prestressed axially.
  • This known safety steering column has the disadvantage that the displacement force between the two casing-tube parts cannot be set or cannot be adapted to this specific application, without the components themselves being modified. Moreover, the force/travel profile when the casing-tube parts are pushed together is not constant, but decreases sharply over the running travel in a way which is unfavorable for the driver. In addition, between the two casing-tube parts, there is no provision for securing against a radial displacement of the casing-tube parts relative to one another.
  • an object on which the present invention is based is to provide a safety steering column for a motor vehicle, with a shortenable casing tube, in which the displacement force between the two casing-tube parts can be set.
  • a safety steering column for a motor vehicle with a casing tube which is arranged concentrically to a steering shaft and is fastened to the vehicle body and which, in the event of an axial impact action, can be shortened, while at the same time absorbing energy
  • the casing tube comprising two casing-tube parts which have different diameters and lie partially one in the other, wherein a connecting element is arranged between the two casing-tube parts, the connecting element being fastened to one of the casing-tube parts and being pressed with a predetermined force into a groove introduced into the other casing-tube part.
  • the safety steering column has a casing tube which is arranged concentrically to a steering shaft and is fastened to the vehicle body and which, in the event of an axial impact action, can be shortened, while at the same time absorbing energy, the casing tube consisting of two casing-tube parts which have different diameters and lie partially one in the other.
  • a connecting element is arranged between the two casing-tube parts. The connecting element is fastened to one of the casing-tube parts and is pressed with a predetermined force into a groove introduced into the other casing-tube part.
  • the displacement force between the two casing-tube parts can be set, without the components themselves being modified.
  • a displacement force is referred to in connection with the invention, this means the force which acts on a steering wheel and during the exceeding of which the connecting element releases the connection between the two casing-tube parts and the two parts are pushed one into the other. Since the connecting element according to the invention is pressed into the groove, displacement can take place only by a frictional force between the connecting element and the groove in the casing-tube part being overcome. This serves for absorbing impact energy.
  • the setting of the displacement force is advantageous particularly when the steering shaft surrounded by the casing tube is likewise configured so as to be capable of being pushed into itself and is designed in such a way that it absorbs energy at the same time.
  • the displacement force of the casing tube can then be set individually, during the assembly process, to the measured actual value of a crash element located in the steering shafting, so that the safety steering column is designed optimally.
  • the displacement force of the safety steering column is constant over the travel. This means that, irrespective of how far the two parts of the casing tube are pushed one into the other, the displacement force is always the same.
  • a further advantage of certain preferred embodiments of the invention is to be seen in that the crash system is reversible, that is to say a casing tube, once pushed together in the event of a crash, can be drawn apart again and set via the crash element.
  • the groove in one of the casing-tube parts and the connecting element engaging into the groove have a conical cross-sectional surface with respect to a sectional plane which is oriented perpendicularly to a longitudinal axis through the two casing-tube parts.
  • the connecting element is pressed into the conical groove by means of at least one screw.
  • the displacement force can thereby be set or adapted in a particularly simple way via the tightening torque of the screws. Screws can also be set by hand according to the individual requirements even during assembly.
  • the screw has a conical end which engages into a corresponding recess in the connecting element.
  • Such a connection likewise affords the advantages during assembly, since the screw is automatically drawn via the conical shape into the corresponding recess in the connecting element, and there is no need to align the connecting element by hand in such a way that it interacts with the screw.
  • the groove is introduced into the outer wall of the casing-tube part which has the smaller diameter.
  • the screw engages correspondingly with its thread into a thread in the casing-tube part which has the larger diameter. Assembly becomes particularly simple as a result, since the screw is easily accessible from outside.
  • the connecting element is a sliding piece according to certain preferred embodiments of the invention, of which at least the surface on which the two casing-tube parts slide against one another when they are pushed together has a defined roughness, so that the frictional force between the two casing-tube parts can be determined exactly after the tightening of the screw.
  • the surface of the groove that is to say its roughness, may also be coordinated with the surface of the sliding piece. Both surfaces are preferably made plane and smooth. The displacement force can thereby by set reliably.
  • the connecting element according to the invention in the case of a steering column which is designed so as to be capable of being pushed together for a crash. In this case, however, the torsional moments additionally occurring in the case of a steering column must be taken into account in the design.
  • FIG. 1 shows a longitudinal section through a safety steering column constructed according to a preferred embodiment of the invention
  • FIG. 2 shows an enlarged illustration of a detail of a connection between two casing-tube parts of the FIG. 1 arrangement
  • FIG. 3 shows a top view and two sectional illustrations of a connecting element between the two casing-tube parts of the embodiment of FIGS. 1 and 2 .
  • FIG. 1 illustrates a longitudinal section through a safety steering column 1 according to the invention.
  • the steering column 1 has a steering shaft 2 .
  • the mechanism for the axial shortening of the steering shaft 2 is not illustrated in the drawing. This mechanism may be configured according to the solutions known from the prior art.
  • the steering column 1 also has a casing tube 3 which consists of a part 3 a with a larger diameter and of a part 3 b with a smaller diameter.
  • the two casing-tube parts 3 a and 3 b lie partially one in the other in the region 4 . They are connected to one another in this region.
  • the casing-tube part 3 a is fastened to the vehicle body part V via schematically depicted connections C.
  • the casing-tube part 3 b has, at its end pointing away from the casing-tube part 3 a , a mounting 5 which ensures a rotation of the steering shaft 2 in the casing tube 3 .
  • the casing-tube part 3 b points into the vehicle interior and serves inter alia for fastening operating elements, such as, for example, a direction indicator.
  • connection of the two casing-tube parts 3 a and 3 b is made via a connecting element in the form of a sliding piece 6 .
  • a groove 7 is introduced into the outward-pointing surface of the inner casing-tube part 3 b .
  • the sliding piece 6 lies in this groove 7 .
  • the sliding piece 6 is fixed to the outer casing-tube part 3 a via screws 8 .
  • the screws 8 engage with a thread, not illustrated, into threaded bores 9 which are introduced into the casing-tube part 3 a .
  • the bores 9 pass through the casing-tube part 3 a and the screws 8 extend completely through these bores 9 .
  • the screws 8 have, outwardly, a structure 11 for the engagement of tools for tightening the screws 8 .
  • the screws 8 are equipped with a conical head 12 . This conical head 12 of the screws 8 engages into corresponding recesses 13 in the sliding piece 6 .
  • the sliding piece 6 and the groove 7 have a conical cross section, starting from a sectional plane 15 which is oriented perpendicularly to a longitudinal axis 14 of the casing tube 3 . This may be gathered from FIG. 3 c which illustrates such a cross section of the sliding piece 6 .
  • the conical recess 13 into which the heads 12 of the screws 8 engage, may likewise be seen in FIG. 3 c .
  • FIGS. 3 a and 3 b illustrate how the recesses 13 are arranged in relation to one another on the sliding piece 6 .
  • the surface 16 of the sliding piece 6 may be configured in such a way that a predetermined roughness is set. The same applies to the conical faces 17 and the corresponding faces of the groove 7 .
  • the casing-tube parts 3 a and 3 b slip on one another via the faces 16 and 17 of the sliding piece 6 in the event of axial displacement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Controls (AREA)
US10/078,155 2001-02-20 2002-02-20 Safety steering column Expired - Fee Related US6848334B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10107871A DE10107871C2 (de) 2001-02-20 2001-02-20 Sicherheitslenksäule
DE10107871.4 2001-02-20

Publications (2)

Publication Number Publication Date
US20020124676A1 US20020124676A1 (en) 2002-09-12
US6848334B2 true US6848334B2 (en) 2005-02-01

Family

ID=7674679

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/078,155 Expired - Fee Related US6848334B2 (en) 2001-02-20 2002-02-20 Safety steering column

Country Status (4)

Country Link
US (1) US6848334B2 (de)
EP (1) EP1232929B1 (de)
JP (1) JP3581136B2 (de)
DE (2) DE10107871C2 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050156423A1 (en) * 2003-12-11 2005-07-21 Michael Appleyard Steering column assembly
US20060001249A1 (en) * 2003-12-04 2006-01-05 Nacam France Sas, A Corporation Of France Energy absorption device for steering column
US20070113701A1 (en) * 2005-11-21 2007-05-24 Delphi Technologies, Inc. Energy absorbing apparatus
US20120104337A1 (en) * 2009-06-09 2012-05-03 Impact Blackhole Co., Ltd. Method for absorbing a vehicle impact using kinetic friction force and rolling force produced by the dragging of a surface of rolled tube, and vehicle impact absorbing apparatus using same
US8714048B2 (en) * 2008-01-18 2014-05-06 Thyssenkrupp Presta Ag Steering column comprising a plastic sliding sleeve
US20180251147A1 (en) * 2015-08-26 2018-09-06 Thyssenkrupp Presta Ag Motor-adjustable steering column for a motor vehicle

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4529796B2 (ja) 2005-05-26 2010-08-25 アイシン精機株式会社 衝撃吸収式ステアリング装置
EP1900601A4 (de) * 2005-12-05 2010-09-08 Castellon Melchor Daumal Mittlerer schaft mit geringer gleitlast für die lenksäule eines kraftfahrzeugs
DE102008008310B4 (de) 2008-02-07 2020-10-15 Axel Hebenstreit Lenksäulenanordnung für einen Kraftwagen
KR102538860B1 (ko) * 2022-10-25 2023-06-01 주식회사 세이브라이프 도로용 충격흡수시설의 접이식 충격에너지 조절 및 흡수장치

Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1541007A (en) * 1921-07-18 1925-06-09 William H Thiemer Slip-end spline connection for universal joints and the like
GB1113147A (en) 1965-12-23 1968-05-08 Bendix Corp Axially adjustable steering columns
GB1120799A (en) 1967-02-03 1968-07-24 Ford Motor Co Collapsible steering columns
US3468182A (en) * 1967-03-03 1969-09-23 Ford Motor Co Collapsible steering column
US3491614A (en) * 1968-07-18 1970-01-27 Bendix Corp Collapsible steering column
US3572751A (en) * 1969-06-16 1971-03-30 Gen Motors Corp Dislodgeable screw anchors and installation
DE1755874A1 (de) 1968-07-04 1972-01-05 Ford Werke Ag Sicherheitslenksaeule fuer Kraftfahrzeuge
US4106311A (en) * 1976-12-13 1978-08-15 The Bendix Corporation No-lash axially movable steering column
US4445708A (en) * 1983-05-09 1984-05-01 General Motors Corporation Energy absorbing steering column for vehicles
US4627306A (en) * 1985-01-07 1986-12-09 Ford Motor Company Energy absorbing steering column for motor vehicles
US4949992A (en) * 1989-09-01 1990-08-21 Ford Motor Company Collapsible steering column
DE4017965A1 (de) 1989-06-15 1990-12-20 Volkswagen Ag Drehfeste verbindung fuer zwei teleskopierende hohlrohrteile, insbesondere mantelrohrteile einer sicherheitslenksaeule
US5074161A (en) 1989-05-11 1991-12-24 The Torrington Company Vehicle steering column incorporating means to decouple it
US5115691A (en) * 1991-09-03 1992-05-26 General Motors Corporation Collapsible shaft assembly
FR2674646A1 (fr) 1991-03-28 1992-10-02 Ecia Equip Composants Ind Auto Dispositif de rattrapage des jeux d'assemblage entre deux organes tubulaires deplacables a coulissement l'un dans l'autre, et arbre de direction de vehicule automobile en comportant application.
US5152627A (en) 1990-03-16 1992-10-06 Reiche & Co. Telescopable steering column of power vehicle
US5169172A (en) * 1990-06-13 1992-12-08 Volkswagen Ag Mounting arrangement for a safety steering column in a passenger vehicle
US5560257A (en) * 1994-06-14 1996-10-01 The Torrington Company Separable connecting device for a steering column
DE19518130A1 (de) 1995-05-17 1996-11-21 Lemfoerder Metallwaren Ag Crashsystem für die Lenksäule in einem Kraftfahrzeug
US5590565A (en) * 1995-02-08 1997-01-07 General Motors Corporation Motor vehicle steering column
JPH109277A (ja) 1996-06-25 1998-01-13 Toyota Motor Corp シャフトの収縮構造
US5706704A (en) * 1996-03-25 1998-01-13 General Motors Corporation Energy absorbing steering column for motor vehicle
US5709605A (en) 1996-12-23 1998-01-20 General Motors Corporation Shaft coupling
US6267528B1 (en) * 1998-07-13 2001-07-31 Nsk Ltd. Coupling structure of variable length shaft

Patent Citations (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1541007A (en) * 1921-07-18 1925-06-09 William H Thiemer Slip-end spline connection for universal joints and the like
GB1113147A (en) 1965-12-23 1968-05-08 Bendix Corp Axially adjustable steering columns
GB1120799A (en) 1967-02-03 1968-07-24 Ford Motor Co Collapsible steering columns
US3468182A (en) * 1967-03-03 1969-09-23 Ford Motor Co Collapsible steering column
DE1755874A1 (de) 1968-07-04 1972-01-05 Ford Werke Ag Sicherheitslenksaeule fuer Kraftfahrzeuge
US3491614A (en) * 1968-07-18 1970-01-27 Bendix Corp Collapsible steering column
US3572751A (en) * 1969-06-16 1971-03-30 Gen Motors Corp Dislodgeable screw anchors and installation
US4106311A (en) * 1976-12-13 1978-08-15 The Bendix Corporation No-lash axially movable steering column
US4445708A (en) * 1983-05-09 1984-05-01 General Motors Corporation Energy absorbing steering column for vehicles
US4627306A (en) * 1985-01-07 1986-12-09 Ford Motor Company Energy absorbing steering column for motor vehicles
US5074161A (en) 1989-05-11 1991-12-24 The Torrington Company Vehicle steering column incorporating means to decouple it
DE4017965A1 (de) 1989-06-15 1990-12-20 Volkswagen Ag Drehfeste verbindung fuer zwei teleskopierende hohlrohrteile, insbesondere mantelrohrteile einer sicherheitslenksaeule
US4949992A (en) * 1989-09-01 1990-08-21 Ford Motor Company Collapsible steering column
US5152627A (en) 1990-03-16 1992-10-06 Reiche & Co. Telescopable steering column of power vehicle
US5169172A (en) * 1990-06-13 1992-12-08 Volkswagen Ag Mounting arrangement for a safety steering column in a passenger vehicle
FR2674646A1 (fr) 1991-03-28 1992-10-02 Ecia Equip Composants Ind Auto Dispositif de rattrapage des jeux d'assemblage entre deux organes tubulaires deplacables a coulissement l'un dans l'autre, et arbre de direction de vehicule automobile en comportant application.
US5115691A (en) * 1991-09-03 1992-05-26 General Motors Corporation Collapsible shaft assembly
US5560257A (en) * 1994-06-14 1996-10-01 The Torrington Company Separable connecting device for a steering column
US5590565A (en) * 1995-02-08 1997-01-07 General Motors Corporation Motor vehicle steering column
DE19518130A1 (de) 1995-05-17 1996-11-21 Lemfoerder Metallwaren Ag Crashsystem für die Lenksäule in einem Kraftfahrzeug
US5664806A (en) * 1995-05-17 1997-09-09 Lemforder Metallwaren Ag Crash system for the steering column in a motor vehicle
US5706704A (en) * 1996-03-25 1998-01-13 General Motors Corporation Energy absorbing steering column for motor vehicle
JPH109277A (ja) 1996-06-25 1998-01-13 Toyota Motor Corp シャフトの収縮構造
US5709605A (en) 1996-12-23 1998-01-20 General Motors Corporation Shaft coupling
US6267528B1 (en) * 1998-07-13 2001-07-31 Nsk Ltd. Coupling structure of variable length shaft

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060001249A1 (en) * 2003-12-04 2006-01-05 Nacam France Sas, A Corporation Of France Energy absorption device for steering column
US7644951B2 (en) * 2003-12-04 2010-01-12 Necam France SAS Energy absorption device for steering column
US20050156423A1 (en) * 2003-12-11 2005-07-21 Michael Appleyard Steering column assembly
US7275767B2 (en) * 2003-12-11 2007-10-02 Trw Lucas Varity Electric Steering Limited Steering column assembly
US20070113701A1 (en) * 2005-11-21 2007-05-24 Delphi Technologies, Inc. Energy absorbing apparatus
US7497470B2 (en) 2005-11-21 2009-03-03 Delphi Technologies, Inc. Energy absorbing apparatus
US8714048B2 (en) * 2008-01-18 2014-05-06 Thyssenkrupp Presta Ag Steering column comprising a plastic sliding sleeve
US20120104337A1 (en) * 2009-06-09 2012-05-03 Impact Blackhole Co., Ltd. Method for absorbing a vehicle impact using kinetic friction force and rolling force produced by the dragging of a surface of rolled tube, and vehicle impact absorbing apparatus using same
US8596903B2 (en) * 2009-06-09 2013-12-03 Impact Blackhole Co., Ltd. Method for absorbing a vehicle impact using kinetic friction force and rolling force produced by the dragging of a surface of rolled tube, and vehicle impact absorbing apparatus using same
US20180251147A1 (en) * 2015-08-26 2018-09-06 Thyssenkrupp Presta Ag Motor-adjustable steering column for a motor vehicle
US10661819B2 (en) * 2015-08-26 2020-05-26 Thyssenkrupp Presta Ag Motor-adjustable steering column for a motor vehicle

Also Published As

Publication number Publication date
EP1232929A3 (de) 2003-12-03
DE50201700D1 (de) 2005-01-13
US20020124676A1 (en) 2002-09-12
EP1232929B1 (de) 2004-12-08
DE10107871C2 (de) 2003-07-17
EP1232929A2 (de) 2002-08-21
JP3581136B2 (ja) 2004-10-27
DE10107871A1 (de) 2002-09-05
JP2002249054A (ja) 2002-09-03

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